Device for milling oil slots in piston rings



May 19, 1942.

zwi/enf@ oye ra/wei Patented May 19, 1942 DEVICE FOR MILLING OIL SLOTS IN PISTON RINGS George Brouwer, Muskegon, Mich., assignor, by mesne assignments, to Ramsey Manufacturing Company, a corporation of Michigan Application March 5, 1940, Serial No. 322,377

2 Claims.

This invention relates to a device for milling oil slots in a plurality-of piston rings in one continuous operation.

Among the objects of this invention is to provide a device for denitely positioning and for accurately cutting oil slots in a plurality of piston rings in one continuous series of operations, such device resulting in the speeding up of production, more perfect merchandise and resultant economies, and such other objects, advantages and capabilities as will later more fully appear and which are inherently possessed by my invention.

While I have yshown in the accompanying drawing a preferred form of my invention, yet I desire it understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawing, Fig. 1 is a top plan view of my device; Fig. 2 is a side elevational view of the same-partly broken away and in section to better show the operation and Fig. 3 is a detailed view of the piston ring.

In the embodiment selected to illustrate my invention the cutter holding arbor I is rotated in a milling machine upon a feed table on which is fastened my complete piston ring device 21. The holding arbor I 0 is rotated by means of gears II by operation of a motor I2. On this arbor I0 is xed cutting members I3 having a plurality of spaced cutting edges I 4. Positioned opposite to said cutting members I3 is a rocker or cradle I5 having a V-shaped receiving portion I6 for an arbor I1 holding a plurality of piston rings I8. The rocker I5 is pivotally mounted on base I9 by means of shaft 4I and is pivoted by operation of a cam which engages a roller 2| attached to said rocker I5.

As the rocker I5 is pivoted downwardly the rings I8 on the arbor Il contact the cutting members I3 for the cutting of oil slots therein. During the cutting operation the arbor I1 is held to the V shaped portion I6 by meansof a clamping arm or lever 22 which contacts the top portion of the arbor I1 on one end and extends rearwardly over a xed roller 23 which imparts a clamping movement to the clamping lever 22. At the rear end of the member 22 there is a cam block 24 which engages the xed roller 23, causing the clamping arm 22 to tilt upwardly forcing the other end of the clamping arm down on the arbor located in the V block-teeter totter fashion. As it does that arbor I0 rotates and with it rotates cutting members I3 so that said rotation of the cutters I3 completes one slot in the rings I8. The cutting members I3 are attached to arbor I0. The rings I8 in the V shaped receiving portion IB are rocked to and from the cutting edges Ill. The cam 20 then permits springs 26 to force the cradle I5 out of contact with the cutting members I3. The operation is repeated the required number of times for the number of slots desired in the piston rings I8.

Having thus described my invention, I claim: 1. A device for milling oil slots in a plurality of piston rings comprising rotatable cutting members, a base, a rocker pivotally mounted on said base and positioned opposite said cutting members, said rocker having a V shaped receiving portion adapted to receive an arbor having a plurality of piston rings, and means for pivoting said rocker forwardly'so that said rings on the arbor in the V shaped portion will contacty said cutting members for cutting oil slots therein, and means for pivoting said rocker rearwardly for withdrawing said rings from contact with said cutting members.

2. A device for milling oil slots in a plurality of piston rings comprising rotatable cutting members, a base, a rocker pivotally mounted on said base and positioned opposite said cutting members, said rocker having a. V shaped receiving portion adapted to receive an arbor having a plurality of piston rings, a cam adapted to pivot the rocker forwardly so that said rings will contact said cutting members for cutting oil slots therein, a clamping member pivotally mounted on said rocker and adapted to hold said arbor having said rings to said V shaped portion during the cutting operation and springs attached to said rocker, said rocker adapted upon movement of the cam to permit the springs to move the rocker rearwardly so that the rings in the receiving arbor will be withdrawn from contact with the cutting members.

, GEORGE BROUWER. 

